I want to have a single life but with you (second weekly entry)

I didn't know how I'll start my second weekly entry but a few hours ago I read an article that left me to think about it. The author is Isabelle Teisser,a Canadian writer, and her letter is based on a girl who writes one letter to her boyfriend and she tells him everything that she wants to do with him and she concludes all that she wrote in this way: ''I want to have a single life but with you''. This letter has became very famous  in social networks like Facebook and Twitter because many teenagers are identify with the author says in this article. I’ve read it in Spanish. Thus, if you want to read the full article I'll put the link here:

http://www.laverdad.es/gente-estilo/201509/29/quiero-estar-soltera-pero-20150929182438.html

I can't understand why these things become so famous because this don’t  happen in the real life. For example: If you’re in  love of someone I doubt that you like the idea that your boyfriend likes other girls, to finally return with  you after staying with them. I think if you're in love, you couldn't withstand that  your boyfriend are with other girls, who are more than friends, because we are jealous by nature and the person who say the contrary, are lying. Is true that confidence is essential  in a relationship but  in my opinion freedom and have a relationship are completely opposite and if you've chosen to be with someone, don't actue like a single person.